loyek590, I appreciate your response, however the response from a tax expert would make me more comfortable, as I'm asking for other parties, not myself. I was an option MM for many years and paid double SS tax. It make no sense to me that claiming that you are a professional trader for tax treatment would still provide you an opportunity to avoid your SS tax, as you claiming it to be a business, not investing. That is the claim to get that status. Sole props and LLC are both stuck with it.
With regard to the home office, the IRS has standardized that deduction beginning in tax year 2013.
http://www.irs.gov/Businesses/Small...d/Simplified-Option-for-Home-Office-Deduction. If you use this formula, you are unlikely to get audited for it.
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